Class Options

Vitality & Skills

Base Vitality

Class Skills

Base Skill Points

6

12

8

9

10

6

12

8

4

In general only very combat oriented classes or classes that are focused on their class abilities rather than skills use the first option, with only the notable skill-based classes taking the later options.

Starting Proficiencies (Base Classes)

These are based on on the advancement linked to both Vitality and Base Attack Bonus. Low and Slow each grant 1 proficiency. Medium and Medium each grant 2 proficiencies. High and Fast each grant 3. Thus a base class can grant between 2 and 6 starting proficiencies.

Class Abilities

Each class type follows a particular skeleton; there are similarities and differencies between the three. "A" can be combined with "C" (Ex: Soldier's Bonus Feat). C, D, and E can each be split into odd/even groups (Ex: Explorer's All Over the World/Danger Sense). A number of Expert classes tend to use the D abilities for an ability to buffs the entire party.
The distinction is that different levels give abilities with different values. For base classes the B slot and the F slot give larger bonuses (typically a +2 to one stat, +1 to two stats or +1 and some other benefit). The E slot gives a +1 when used for an attribute bump, and is frequently used for a multi-choice ability.

In the Expert classes the D slot is similar to the 4/8/12/16/20 or 6/9/12/15/18 slots of base classes, while the F slot is rated on par with the 2/11/19 set and so if that's where the class gets an attribute bump, it's one of those larger bumps; certain abilities such as Uncanny Dodge and Evasion are restricted to one of these slots to ensure parity with base class progressions. Getting an attribute bump not in the D slot (filled by sidetrack) but in the unique 'E' slot that Expert classes have is unusual, but not strictly prohibited.

Base and Expert classes receive a Core ability as a reward for taking the first level of that class type in that class. Despite the name, it is ill advised to have any standard class ability rely on the possession of the core ability, especially with base classes.
Master classes do not gain a core ability, but may instead receive Continuity — adding any 2 skills from previous base and expert class levels to the new class's skill list. As a result, the base skill list of a class with Continuity is 2 less than standard.

Class Requirements

Overlapping prerequisites: When a required trait is also a
prerequisite of another trait (ex. The regent's required feats
themselves require 1 rank of noble Renown and Cha 13+.
Thus instead of getting 4 points for Cha 15+ and Noble
Renown 3+, the Regent is credited for only 3).